Power-hammer



Peeeeeed Feb.17,1920.

2 SHEETS-SHEET l.

n Va/b, m f fd a f y@ i e i i e Q I I. l ,M /e .ef /y 1 fgf J.- W. FLOWER.

POWER HAMMER.

APPLICATION FILED Aue.22. 191s.

1,330,857. Patented Feb. 17,1920.

2 SHEETS-SHEET 2.

. d? f I |11 Il" W JOHN WALTER FLQVER, OF VJ'IvBORNE, ENGLAND.

PQVEB-HAMMER.

Specification of Letters Patent.

Fatented Feb. 17, 1920.

Application filed August 22, 1916. Serial No. 116,381.

To all whom t may concer Be 1t known that I, JOHN lllAL'rnn FLOWER,

'a citizen of the United Kingdom of Greatv Britain and lreland, and resident of Eclipse Works, Wimborne, Dorset, England, have invented certain new and useful :improvements in Fower-Hammers, of which the following is a specification, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to hammers and while applicable Vfor various purposes such as riveting, welding, and planishing is specially designed for riveting the end or base plates of shells.

The illustrated form of the machine may be broadly described as consisting of a frame or support carrying one or more pneumatic hammers and a device preferably in the form ot a plunger, to assist in holding the work-piece while the hammer strikes. The work-piece is arranged on a table or carrier, usually a socket made in two parts one of which is capable of being turned upon the other about an aXis which, in a general way, would be about parallel to the line of stroke of the hammer, both the said parts being capable of being swung on a pivot, set at right angles to the stroke of the hammer, to bring the work-piece away from or into position to be operated upon by said hammer.

The table or holder, is preferably rotated by worm gear, driven from a pulley on the machine.

For the purpose of working upon shells, the construction and arrangement of the machine may be substantially as shown in the accompanying drawings in which Figure 1 is a front elevation of a machine embodying my invention.

Fig'. 2 is a side elevation of the machine shown in Fig. l with the shell-carrying holder or socket in operative position.

Figs. 3 and l show details of the pneumatic hammer and its cylinder.

Figs. 5 and 6 show other details.

In these drawings the machine comprises Va column a on base b. This column carries bracket c which forms the working cylinder d. Above this cylinder a crank e is fitted and has connected tro it a rod f which Jforms the rod of a piston g.

The shaft h which carries the crank is fitted with fast and. loose pulleys i and on one side and on the other side with a small pulley lc over which a belt Z runs.

@n the lower part of the column a a bracket n carries a rotatable holder or socket made in two parts 0 and o, the lL tter or which is pivoted to the bracket at 70 and is Jfurnished with a worin-wheel m adapted to be brought into and out of mesh with a worm 1 driven by a belt Z.

The holder or socket o and 0 is capable of being swung by hand on' its pivot p away from the column a to permit the placing in to it and the removal from it of a shell such as e. The bracket can be locked on the column a, at varying heights and at any desired radial position so as to suit the machine to shells, or other work-piece of varying kinds and sizes. This locking can be eii'ected by any known or suitable means such as making the bracket of split form and clamping it upon column with screws or ordinary set scre'ws may be used.

Cylinder CZ has two side openings or vents s and t either or both of which may be controllable by any convenient means such as screws.

The air piston g reciprocates in the upper end of the cylinder above the other piston u which carries the hammer o the nose or 0perative end ot which projects below the extension or sleeve CZ when striking a blow. Adjacent to the nose of the hammer is the spring controlled plunger w which rests upon the shell and holds same while the hammer is working. In double hammer machines two pneumatic cylinders are employed with one or more devices such as the plunger fw for holding the work-piece.

ln Figs. 5 and 6 the lower end ot the socket o is shown pivoted at 79 and having extending from it an arm o2 below which is spindle having a flat side m2 which engages under the said arm. This spindle is rigid with lever and is movable in the bracket n.. When the lever a: is moved it turns the spindle and alters the tilt of the arm 02 thereby moving the top of the shell z in relation to the hammer o. By this means the blows from the hammer are made in concentric circles on the shell. The necessary movement of the shellis very little and is insuiiicient to disengage the worm r from the worm wheel Q the said worm and the teeth of the said worm wheel being sulficiently deep to engage each other in any position which the shell may take to beV hammered.

l/Vhen the shell has taken any desired position under the hammer the lever y is pulled so as to cause a collar y which has a sloping face to press against a collar n on the bracket n, said collar n also having a sloping' face, and cause the sides of the bracket about the pivot p to grip the lower partV of the socket -member o and hold it in the required position.

When-the machine is started the hammer strikes rapid blows as the shell revolves.Y

After the first revolution or a suiicient number of revolutions of the shell the lever y is Vmoved and releases the part o ofthe socket, Y

It will Ibe seen that the machine is complete in itself, no air compressor or pipe lines are required and thus trouble from rust and particles of rubber from the pipes and hose are eliminated as well as risks of compressor and pipe line explosions, caused by accumu-V In VadditionV to Y these advantages a variable elastic blow free Y lations of carbonized oil.

from all jar is obtained. Y

What I claim and desire to securerby Let-VV ters Patent is:-

' In combination,Y aV standard, a hammer ,Y carried thereon, a crank shaft, arrod con-V necting the crankshaft Yto the hammer, a

bracket on said standard, a rotatable holder for carrying a workpiece and mounted to be swung,` about a pivot set out ofralineiiientV f with the ystroke of the hammer, a worm wheel secured to the holder, aworm shaft with Vworm gearing with the said wheel, driving means from the crankshaft tothe. worm shaft and` means forfswinging the holder about the pivot.`

VIn witness whereof I'have vhereunto set my hand in presence of two witnesses. i

JoiiuwaLTER-FLovvER` Witnesses: Y Y Y LILY PARRY, VHENRYV FArRBRo'rHER. 

